Hoist



Aug. 6, 1946- s. s. MclNTYRE HOIST Filed Sept. 2'7, 1944 2 Sheets-Sheet2 INVENTOR, aw/5y Wf]? mi Patented Aug. 6, 19 46 UNITE STATES TENT OFFIC5 Claims.

This invention relates to cable windin hoists and the like, and it hasreference more particularly to improvements in a cable winding drum anddriving clutch combination that is especially adapted for use in hoistsof those types used extensively in logging operations and comprisingcable winding drums mounted for free turning on their supporting shaftsand designed to be driven for the winding in of cables thereon, throughthe engagement of cooperatively arranged clutch elements fixed on endflanges of the drums and on driven gears that are mounted to revolve onthe drum mounting shafts and to be shifted on their shafts, from andtoward the drums, as is required to engageor disengage, by springpressure, the complemental clutch elements.

It is the principal object of this invention to provide novel controlmeans for the manual hifting and holding of the drum driving gear wheelsfor the quick and effective engagement or disengagement of complementalclutch elements; and through which pressure may be applied to hold theclutch elements functionally engaged but with a minimum of friction andwear on the parts of the control means. Furthermore, to provide a manualclutch means for applying the clutch that is carried on the drummounting shaft itself, and not on independent frame members.

Another object of the invention is to provide novel means formaintaining the drum against movement along its shaft and its properrelationship to th clutch elements.

Another object of the invention is to provide a combination as abovestated that is relatively simple and comparatively inexpensive, yeteffective and efficient in its use.

It is also an object of the invention to provide an improved form ofhoist frame structure wherein the frame of the power plant and the cabledrum mounting shafts serve as parts of the frame structure, givingrigidity, strength and durability thereto without additional weight. 1

Other objects of the invention reside in the details of construction ofthe various parts embodied in the device; in their combination andrelationship in the operative assembly and in the mode of use andoperation of the device as will hereinafter be fully described.

In accomplishing the above mentioned and other objects of the invention,I have provided the improved details of construction, the preferredforms of which are illustrated in the accompanying drawings wherein Fig.1 is a side view of a cablewinding hoist embodying improvements inaccordance with the stated objects of the present invention.

Fig. 2 is a somewhat enlarged sectional view of one of the cable windingdrums, taken substantially in its horizontal axial plane and howing thecable winding drum and its adjusting means, the drum supporting shaft,and the corresponding driving gear and clutch mechanism.

Fig. 3 is a cross section taken on line 33 in Fig. 2. a

Fig. 4. is a vertical section taken on line l-fi in Fig. 2.

Fig. 5 is a cross section of a shaft bearing, taken On line 5-5 in Fig.2, and showing the adjustable split sleeve as clamped in the bearing.

Fig. .6 is a detail of the clutch adjusting nut and its turning lever.

Fig. 7 is a detail of the porting bearings. 1

Referring more in detail to the drawings- The frame structure of thepresent hoist com prises two parallel, transversely spaced andlongitudinally extended base beams l and I (seen in Fig. 2) of channelor I-beam form, joined drive shaft and its supacross one end of theframe by spaced, transversely directed beams 2 and 2a, fixed rigidly bsuitable means upon their upper edge flanges. Upon these cross beams thepower plant, or

2 and 2a, the base frame 3 of engine, 3:1: is supported. The engine baseframe is securely bolted, as at 4, to these latter cross beams and,being of heavy rigid construction, it serves in effect as a part of theframe structure. The engine 35c, as here shown, is disposed transverselyof the base frame and its drive shaft 35 is equipped at one end with abelt driving pulley or gear 5.

Rigidly erected on the beams l and l, substantially medially of theirends, and in oppositely disposed relationship, are longitudinal frames 6that are joined across their ends by a channel beam 6, as seen inFig. 1. .Each of the frames 6 is equipped with bearings, as at I in Fig.7, wherein a drive shaft 8 is rotatably mounted. This drive shaft isequipped at its end with a belt gear or pulley 9 alined with the engineear or pulley 5 and a belt Ill extends about these parts to drive theshaft 3. Keyed or otherwise fixed on the shaft 8, at the inside ofbearing 7, are driving gear wheels I! and l i (see Fig. 6) which,respectively, are in driving mesh With larger gear wheels l2 and If thatare revoluble on cross shafts l3 and it which respectively support cablewinding drums I4 and It for rotation thereon. The shaft l 3 is shown inFig. 2 as being mountedat its ends in bearings lit-I5 which are formedon the top flanges of the longitudinal beams l and I, and the drum i4 issupported for rotation on this shaft through the mediacy ofanti-friction bearings i6 and [6 applied and secured within the oppositeends of its hub portion. The inner raceway N of the bearing at one endof the drum engages against an annular shoulder IT on the shaft. At theother end of the drum, a split sleeve I8 is applied about the shaft andthis engages at its inner end with the inner raceway of thecorresponding hearing it. A nut i9 is threaded onto the shaft end toengage the outer, end of the sleeve to press it tightly against thebearing, its shifting on the shaft. The split sleeve 8 is seated in theframe bearing l5 and is to be clamped securely against movement afteradjustment, by the bearing cap :1: as shown in Fig. 5.

At one end, the drum brake rim to which a brake band, not shown. may beapplied to control the paying out of a cable from the drum, and at itsother end, the drum has a flange 22 equipped concentric of the drumaxle, with an annular inwardly tapered channel 23 for reception ofcorrespondingly tapered clutch shoes 24 that are fixed to the insideface of the driven gear wheel l2.

Gear wheel i2 is mounted by an anti-friction bearing 25 to rotate freelyon shaft l3 and there is provision for limited, longitudinal shifting ofthe gear on the shaft in order to engage, or disengage the clutch shoeswith the side surfaces of the clutch channel. The means for shifting thedriven clutch gear and for holding it in engaged or disengagedpositions, form an important part of this invention, and will now bedescribed.

By referring more particularly to Figs. 2, 3 and 4, it is to be observedthat the hub portion 121: of gear wheel i2 contains the bearing 25therein and the bearing assembly is held in plac by a ring or collar 3!)that is slidable along the shaft and is contained rotatably within acollar 3! that is fixed to the hub by bolts 32. The collar 3| and wheelhub may rotate freely about collar 39, but the wheel hub is notshiftable endwise of the collar due to the fact that the collar is heldbetween the bearings 25 and the retained collar 3 l.

Fixed in the collar along shaft (3 and slidably through the shaftsupporting bearing l5, are pull rods 35, shown best in Fig. 2. At theirouter ends these rods are anchored by nuts 36 in an annular plate ordisk 31 that encircles the shaft l3. Between the disk 31 and abutments38 that are fixed on the bearing [5, are coiled springs 39. These arheld under compression, and act through the disk 31 and rods toautomatically pull the gear wheel l2 to clutch releasing positionWhenever the clutch is not positively held engaged.

To manually engage the complemental clutch of the drum and gear fordriving the drum, and to retain them positively engaged, I provide thefollowing means:

Formed diametrically through shaft l3, within that part that is enclosedby collar 33, is a slot 50, and extended therethrough is a disposed toengage edgewise at its or passage flat bar 5|, opposite ends, in

30. The passage 50 is of such extentlengthwise of the shaft [3 as toallow the movement of the bar therealong for the required clutchengaging or disengaging movement of the gear wheel I2 along th shaft.The adjacent end of shaft I3 is (4 is equipped with a 30 and extendedtherefrom seats 52 provided in the collar thus to hold the drum in placeto prevent to move gear that is applied to the bas of cap 55. Thus,

by rotation of the cap in a direction to thread it onto the extension54, the push rods 58 will apply inward pressure on cross bar 5| wherebyl2 inwardly on shaft l3 to engage the clutch elements of gear and drumto drive the drum. When the cap is turned in the other direction tothread it outwardly, pressure through the push rods 58 is released andthe pressure of the springs 38 On plate 31 shifts the gear outwardly anddisengages the complemental clutch elements; .thus the drum is free torevolve on its shaft for unwinding th cable therefrom under control ofwhatever brake mechanism might be used.

It is noted in Fig. 6 that the hand lever 55 is formed with a splitcollar mounting that may be applied about the cylindrical outer surfaceof the nut 55 and then secured by a clamp bolt 57 that is passed throughlugs 68 on the split ends of the collar. This provision'makes possibleadjustment and securement of the lever to any desired operatingposition.

It has been shown in Fig. 1 of the drawings, that the drum [4' iscarried on the cross shaft l3. This shaft is mounted in bearings. l5 onthe upper .edge of frames 5. The mounting of this drum and details ofits control means are like those of drum l4 already described, and thedescription will not be repeated, but will be understood to applyequally to both.

With the hoist so constructed, it will be understood that the crossshafts l3 and I3, when fixed in their supporting hearings, will add tothe rigidity of the hoist structure and therefore these shafts, asidefrom that of mountings for the drums, serve the additional purpose offrame members. Y

The clutch control means is positive'and effectiv'e,and reduces wear toa minimum. The partsv 5i and 58 are easily removable for replacementwhen worn and these are the only parts that receive any appreciableamount of wear. The clutch setting devices, because'of their being onthe shaft l3 and not on an independent member, at all times maintain thesame relationship to the gear and drum.

Having thus described my invention, what I claim as new therein anddesire to secure by Letters Patent is:

1. In a hoist of the character described, a

frame structure including spaced bearings, a

cross shaft fixedly mounted in said bearings, a

cable winding drum and a driven gear wheel ametric passage therein atthe location of the wheel hub and having an axial bore from one end tosaid passage, a cross bar in the passage seated at its ends against thesaid collar, and pressure applying members disposed in the said bore andbearing against said cross bar and means threaded on the shaft againstthe said members to shift the gear wheel for engaging the clutchelements to drive the drum.

2. In a hoist of the character described, a frame structure includingspaced bearings, a cross shaft fixedly mounted in said bearings, a cablewinding drum and a driven gear wheel revoluble on the shaft between thebearings; said gear wheel being axially shiftable a limited distance onthe shaft, complemental clutch elements on the drum and gear wheeladapted to be engaged and disengaged by the shifting of said gear wheelin opposite directions, a collar slidable on the shaft and secured inthe wheel hub for rotation of the hub thereabout, pull rods, with endsfixed in said collar, extended along the shaft and slidable through oneof said frame bearings, springs acting against said bearing and rods toshift the gear wheel for disengaging the clutch elements; said shafthaving a longitudinal slot diametrically therethrough and having anaxial bore from one end to said slot, a cross bar extending through theslot and seated at its ends in the collar, and a push rod contained inthe shaft bore and engaged with the cross bar, and mean threaded ontothe shaft end against the push rod and adjustable to move the gear wheelto engage the clutch elements to drive the drum.

3. In a hoist of the character described, a frame structure includingspaced bearings, a cross shaft fixedly mounted in the bearings, a cablewinding drum and a driven gear wheel revoluble on the shaft between thebearings; said gear wheel being shiftable 0n the shaft from and towardthe drum and there being complemental friction clutch elements on thedrum and gear to be disengaged and engaged by such shifting, a collarslidable on the shaft and fixed in the gear hub for rotation of the hubthereabout; said shaft having a longitudinal slot, diametricallytherethrough at the location of the gear and having an axial bore fromone end opening into said slot, a cap threaded onto that end of theshaft, a cross bar disposed in said diametric slot and seated at itsends against said collar, a plurality of push rods disposed in the borein end to end contact between the cap and cross bar, a handle forturning the cap to thread inwardly on the shaft to efiect an applicationof force, through said push rods, to the cross bar for shifting the gearwheel to engage the clutch elements for driving the drum, and yieldingmeans acting on the collar to move the gear to disengage the clutchelements upon the release of holding pressure by threading the capoutwardly on the shaft end.

4. In a hoist of the character described, a frame structure includingspaced bearings, a cross shaft fixedly mounted in the bearings, a cablewinding drum and a driven gear Wheel revoluble on the shaft between thebearings; said gear Wheel being shiftable on the shaft from and towardthe drum and there being complemental friction clutch elements on thedrum and gear to be disengaged and engaged by such shifting, a collarslidable 0n the shaft and fixed, in the gear hub for rotation of the hubthereabout; said shaft having a diametric slot thereth'rough at thelocation of the gear and having an axial bore from one end into saidslot, a cap nut threaded onto that end of the shaft, a cross bar set insaid diametric slot and seated at its ends in said collar, a pluralityof thrust bearing elements in end to end contact, located in the boreand engaged with the cap and cross bar, a lever for turning the cap tothread it onto the shaft to effect an application of force, through saidbearing elements, to the cross barfor shifting the gear Wheel to engagethe clutch elements for driving the drum, pull rod fixed on the collarand extended along the shaft and slidable through one of the bearings, aplate fixed to the rod ends, abutments onthe bearing and springsdisposed under pressure between the abutments and plate to urge thewheel utwardly to disengage the clutch elements when holding pressure isreleased upon threading the cap outwardly on the shaft end.

5. In a hoist of the character described, a frame structure includingspaced bearings, a cross shaft mounted at its ends in said bearings andhaving an annular collar thereon, a drum revoluble on the shaft andhaving anti-friction bearings fitted in opposite ends of its hub portionfor support of the drum on the shaft; one of said bearings being seatedagainst said collar of the shaft, a split sleeve adjustable along theshaft and engaged against the other bearing of the drum to cooperatewith the annular collar to hold the drum against movement along theshaft, a nut on the shaft, adjustable against the outer end of thesleeve to hold it at a set position, and said sleeve being seated by andclamped in one of the frame bearings.

SIDNEY s. MCINTYRE.

